Allegro Wiki - Recent changes [en]

Talk:Creating a fullscreen display with current desktop resolution

2012-05-16T23:24:42Z

← Older revision		Revision as of 23:24, May 16, 2012
Line 6:		Line 6:
	Also, '''ALLEGRO_FULLSCREEN''' was wrong (previous version?), changed to '''ALLEGRO_FULLSCREEN_WINDOW''' instead, now working.		Also, '''ALLEGRO_FULLSCREEN''' was wrong (previous version?), changed to '''ALLEGRO_FULLSCREEN_WINDOW''' instead, now working.
	--[[User:daPhyre\|daPhyre]] 19:11, May 10, 2012 (UTC)		--[[User:daPhyre\|daPhyre]] 19:11, May 10, 2012 (UTC)
		+
		+	The '''ALLEGRO_FULLSCREEN''' flag is not old, and it doesn't have anything to do with the '''ALLEGRO_FULLSCREEN_WINDOW''' and "allegro5/allegro_native_dialog.h" has been available since Allegro 5.0.0. The extra header files have been removed, and feel free to check for the return value of the functions if you want. --[[User:AMCerasoli\|AMCerasoli]] 23:24, May 16, 2012 (UTC)

Creating a fullscreen display with current desktop resolution

2012-05-16T23:19:40Z

Undo revision 6360 by DaPhyre (Talk) Read the talk page.

← Older revision		Revision as of 23:19, May 16, 2012
Line 6:		Line 6:

	<source lang="c">		<source lang="c">
-	~~#include "stdio.h"~~
	#include "allegro5/allegro.h"		#include "allegro5/allegro.h"

Line 14:		Line 13:
	ALLEGRO_DISPLAY_MODE disp_data;		ALLEGRO_DISPLAY_MODE disp_data;

-	~~if(!~~al_init()~~) {~~	+	al_init(); // I'm not checking the return value for simplicity.
-	~~fprintf~~(~~stderr, "failed to initialize allegro!\n"~~);	+	al_init_image_addon();
-	~~return -1~~;	+	al_init_primitives_addon();
-	}	+

	al_get_display_mode(al_get_num_display_modes() - 1, &disp_data);		al_get_display_mode(al_get_num_display_modes() - 1, &disp_data);

-	al_set_new_display_flags(~~ALLEGRO_FULLSCREEN_WINDOW~~);	+	al_set_new_display_flags(ALLEGRO_FULLSCREEN);
	display = al_create_display(disp_data.width, disp_data.height);		display = al_create_display(disp_data.width, disp_data.height);

Line 56:		Line 54:

	<source lang="c">		<source lang="c">
-	al_set_new_display_flags(~~ALLEGRO_FULLSCREEN_WINDOW~~);	+	al_set_new_display_flags(ALLEGRO_FULLSCREEN);
	display = al_create_display(disp_data.width, disp_data.height);		display = al_create_display(disp_data.width, disp_data.height);
	</source>		</source>

-	<code>al_set_new_display_flags(~~ALLEGRO_FULLSCREEN_WINDOW~~)</code> tells Allegro to display in fullscreen mode. Then, we create our display with the maximum resolution available with <code>al_create_display(disp_data.width, disp_data.height);</code>, and store a pointer to it in <code>display</code>.	+	<code>al_set_new_display_flags(ALLEGRO_FULLSCREEN)</code> tells Allegro to display in fullscreen mode. Then, we create our display with the maximum resolution available with <code>al_create_display(disp_data.width, disp_data.height);</code>, and store a pointer to it in <code>display</code>.

	Remember that the resolution is going to change from monitor to monitor, so if you place an image in the coordinates (200, 200) in a 800×600 monitor, isn't going to looks the same in a 1920×1080 monitor. Instead of using hard-coded coordinates, you should use percentages or another method of ensuring that your display can adapt itself to any possible resolution.		Remember that the resolution is going to change from monitor to monitor, so if you place an image in the coordinates (200, 200) in a 800×600 monitor, isn't going to looks the same in a 1920×1080 monitor. Instead of using hard-coded coordinates, you should use percentages or another method of ensuring that your display can adapt itself to any possible resolution.

RenderState

2012-05-13T14:35:37Z

New page

<source lang="c">
/* Clears the depth buffer to the specified value. */

void al_clear_depth_buffer(float x);

/* Updates the given render state (for the current target bitmap). */

void al_set_render_state(ALLEGRO_RENDER_STATE state, int value);

enum ALLEGRO_RENDER_STATE {
/* combination of ALLEGRO_BITMAP_WRITE_FLAGS, default is 0 */
// in Opengl this is glColorMask and glDepthMask

ALLEGRO_WRITE_MASK,

/* 1 or 0, default is 0. If 0 the depth buffer is not used at all, neither
* read nor writen. If 1 ALLEGRO_WRITE_MASK and ALLEGRO_DEPTH_FUNCTION
* specify whether it is written and how it is compared.
*/
// in OpenGL this is glEnable(GL_DEPTH_TEST)

ALLEGRO_DEPTH_TEST,

/* one of ALLEGRO_RENDER_FUNCTION, default is NEVER */
// in OpenGL this is glDepthFunc

ALLEGRO_DEPTH_FUNCTION,

/* 1 or 0, default is 0. If 0 all pixels are always written no matter the
* alpha value.
*/
// in OpenGL this is glEnable(GL_ALPHA_TEST)

ALLEGRO_RENDER_STATE_ALPHA_TEST = ALLEGRO_ALPHA_TEST,

/* one of ALLEGRO_RENDER_FUNCTION, default is NEVER */
// in OpenGL this is glAlphaFunc

ALLEGRO_ALPHA_FUNCTION,
};

enum ALLEGRO_RENDER_FUNCTION {
ALLEGRO_RENDER_NEVER,
ALLEGRO_RENDER_ALWAYS,
ALLEGRO_RENDER_LESS,
ALLEGRO_RENDER_EQUAL,
ALLEGRO_RENDER_LESS_EQUAL,
ALLEGRO_RENDER_GREATER,
ALLEGRO_RENDER_NOT_EQUAL,
ALLEGRO_RENDER_GREATER_EQUAL,
};

enum ALLEGRO_WRITE_MASK_FLAGS {
ALLEGRO_MASK_RED = 1 << 0,
ALLEGRO_MASK_GREEN = 1 << 1,
ALLEGRO_MASK_BLUE = 1 << 2,
ALLEGRO_MASK_ALPHA = 1 << 3,
ALLEGRO_MASK_DEPTH = 1 << 4,
};

</source>

User:Parker Milner

2012-05-10T18:26:21Z

Created page with 'Hi guys, my name is Parker and I'm a programmer... Ive done a little bit of video game programming about 5years ago, but the Chinese stole my domain after I failed to renew it. …'

New page

Hi guys, my name is Parker and I'm a programmer... Ive done a little bit of video game programming about 5years ago, but the Chinese stole my domain after I failed to renew it. Its a cut throat Industry! After reading a little bit about the allegro 5 product, and 2d game design, Im very intrigued to learn more. Please contact me on my talk page for and advice. Thanks friends.
<br>
----
Climb to the [http://www.vertexincorporated.com/ <span style="color: #000000;">vertex] young one...

Talk:Creating a fullscreen display with current desktop resolution

2012-05-10T05:09:37Z

← Older revision		Revision as of 05:09, May 10, 2012
Line 2:		Line 2:
	Also, '''ALLEGRO_FULLSCREEN''' caused my display to fail to be created for me but I assume this is beyond the scope of this page.		Also, '''ALLEGRO_FULLSCREEN''' caused my display to fail to be created for me but I assume this is beyond the scope of this page.
	--[[User:ZMonad\|ZMonad]] 12:17, February 3, 2012 (UTC)		--[[User:ZMonad\|ZMonad]] 12:17, February 3, 2012 (UTC)
		+
		+	'''allegro5/allegro_image.h''', '''allegro5/allegro_primitive.h''' and '''allegro5/allegro_native_dialog.h''' where not required, so they where better removed.
		+	Also, '''ALLEGRO_FULLSCREEN''' was wrong (previous version?), changed to '''ALLEGRO_FULLSCREEN_WINDOW''' instead, now working.
		+	--[[User:daPhyre\|daPhyre]] 19:11, May 10, 2012 (UTC)

Creating a fullscreen display with current desktop resolution

2012-05-10T05:04:49Z

← Older revision		Revision as of 05:04, May 10, 2012
Line 6:		Line 6:

	<source lang="c">		<source lang="c">
		+	#include "stdio.h"
	#include "allegro5/allegro.h"		#include "allegro5/allegro.h"
-	~~#include "allegro5/allegro_image.h"~~
-	~~#include <allegro5/allegro_primitives.h>~~
-	~~#include "allegro5/allegro_native_dialog.h"~~

	int main(){		int main(){
Line 16:		Line 14:
	ALLEGRO_DISPLAY_MODE disp_data;		ALLEGRO_DISPLAY_MODE disp_data;

-	al_init()~~; // I'm not checking the return value for simplicity.~~	+	if(!al_init()) {
-	~~al_init_image_addon~~();	+	fprintf(stderr, "failed to initialize allegro!\n");
-	~~al_init_primitives_addon();~~	+	return -1;
		+	}

	al_get_display_mode(al_get_num_display_modes() - 1, &disp_data);		al_get_display_mode(al_get_num_display_modes() - 1, &disp_data);

-	al_set_new_display_flags(~~ALLEGRO_FULLSCREEN~~);	+	al_set_new_display_flags(ALLEGRO_FULLSCREEN_WINDOW);
	display = al_create_display(disp_data.width, disp_data.height);		display = al_create_display(disp_data.width, disp_data.height);

Line 57:		Line 56:

	<source lang="c">		<source lang="c">
-	al_set_new_display_flags(~~ALLEGRO_FULLSCREEN~~);	+	al_set_new_display_flags(ALLEGRO_FULLSCREEN_WINDOW);
	display = al_create_display(disp_data.width, disp_data.height);		display = al_create_display(disp_data.width, disp_data.height);
	</source>		</source>

-	<code>al_set_new_display_flags(~~ALLEGRO_FULLSCREEN~~)</code> tells Allegro to display in fullscreen mode. Then, we create our display with the maximum resolution available with <code>al_create_display(disp_data.width, disp_data.height);</code>, and store a pointer to it in <code>display</code>.	+	<code>al_set_new_display_flags(ALLEGRO_FULLSCREEN_WINDOW)</code> tells Allegro to display in fullscreen mode. Then, we create our display with the maximum resolution available with <code>al_create_display(disp_data.width, disp_data.height);</code>, and store a pointer to it in <code>display</code>.

	Remember that the resolution is going to change from monitor to monitor, so if you place an image in the coordinates (200, 200) in a 800×600 monitor, isn't going to looks the same in a 1920×1080 monitor. Instead of using hard-coded coordinates, you should use percentages or another method of ensuring that your display can adapt itself to any possible resolution.		Remember that the resolution is going to change from monitor to monitor, so if you place an image in the coordinates (200, 200) in a 800×600 monitor, isn't going to looks the same in a 1920×1080 monitor. Instead of using hard-coded coordinates, you should use percentages or another method of ensuring that your display can adapt itself to any possible resolution.